Interrupt redirection for virtual partitioning
a virtual partition and interrupt technology, applied in the field of interrupt redirection, can solve the problems of vmm to trap the interrupt, affecting performance, and affecting the performance of the devi
Active Publication Date: 2005-06-09
INTEL CORP
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Benefits of technology
The patent text discusses a technique for efficiently handling interrupts (or requests for attention) in a virtualization environment. With the rise of processor architectures that are more complex, it becomes more challenging to ensure that interrupts are properly directed to the correct processor. The disclosed subject matter provides a solution for steering interrupts between multiple logical processors running virtual machines in a way that improves performance and reduces the impact on system performance caused by trapping interrupts.
Problems solved by technology
The virtualization of machine resources has been of significant interest for some time; however, with processors becoming more diverse and complex, such as processors that are deeply pipelined / super pipelined, hyperthreaded, and processors having Explicitly Parallel Instruction Computing (EPIC) architecture, and with larger instruction and data caches, virtualization of machine resources is becoming an even greater interest.
Internal hardware interrupts may occur when a program attempts an impossible action, such as, for example, accessing an unavailable address or dividing by zero.
Typically, if the interrupt from an assigned device is delivered to a processor that is not running the target VM, the interrupt causes the VMM to trap the interrupt.
This software based interrupt steering often causes reduction in performance.
Method used
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[0015] In the following detailed description, numerous details are set forth in order to provide a thorough understanding of the present disclosed subject matter. However, it will be understood by those skilled in the art that the disclosed subject matter may be practiced without these specific details. In other instances, well-known methods, procedures, components, and circuits have not been described in detail so as to not obscure the disclosed subject matter.
[0016]FIG. 1 is a flowchart illustrating an embodiment of a technique for steering interrupts between multiple logical processors running virtual machines in accordance with the disclosed subject matter. Block 110 illustrates that a processor may be associated with a particular VM utilizing a VM identifier (VM-ID). In one embodiment, each VM may be assigned a unique identifier by a Virtual Control Block (VCB). In one embodiment, the VCB may be a virtual machine monitor (VMM), as described above. In another embodiment, the VC...
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The present disclosure relates to the handling of interrupts in a environment that utilizes virtual machines, and, more specifically, to the steering of interrupts between multiple logical processors running virtual machines.
Description
BACKGROUND [0001] 1. Field [0002] The present disclosure relates to the handling of interrupts in a environment that utilizes virtual machines, and, more specifically, to the steering of interrupts between multiple logical processors running virtual machines. [0003] 2. Background Information [0004] The virtualization of machine resources has been of significant interest for some time; however, with processors becoming more diverse and complex, such as processors that are deeply pipelined / super pipelined, hyperthreaded, and processors having Explicitly Parallel Instruction Computing (EPIC) architecture, and with larger instruction and data caches, virtualization of machine resources is becoming an even greater interest. [0005] Many attempts have been made to make virtualization more efficient. For example, some vendors offer software products that have a virtual machine system that permits a machine to be partitioned, such that the underlying hardware of the machine appears as one or...
Claims
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IPC IPC(8): G06F9/455G06F9/48G06F12/00
CPCG06F9/4812G06F9/45533
Inventor MADUKKARUMUKUMANA, RAJESH S.SCHOINAS, IOANNISNEIGER, GILBERT
Owner INTEL CORP